--- a/git/GitStructure.st	Tue Oct 02 15:41:46 2012 +0000
+++ b/git/GitStructure.st	Wed Oct 03 18:33:25 2012 +0000
@@ -28,6 +28,16 @@
     "Created: / 30-09-2012 / 20:21:27 / Jan Vrany <jan.vrany@fit.cvut.cz>"
 !
 
+new: size
+    size == self structSize ifFalse:[
+        self error:'Invalid size for git_checkout_opts'.
+        ^nil.
+    ].
+    ^(super new: size) initialize.
+
+    "Created: / 19-09-2012 / 18:13:42 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+!
+
 newAddress: address
     ^self address: address size: self structSize.
 
@@ -42,6 +52,14 @@
     "Created: / 19-09-2012 / 01:53:13 / Jan Vrany <jan.vrany@fit.cvut.cz>"
 ! !
 
+!GitStructure methodsFor:'initialization'!
+
+initialize
+    1 to: self size do:[:i|self at: i put: 0]
+
+    "Created: / 03-10-2012 / 20:31:47 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+! !
+
 !GitStructure methodsFor:'private'!
 
 fromExternalAddress:anExternalAddress